CVE-2025-50666: A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of multiple param

This month

HIGH 7.5REMOTEMITIGATE

CVE-2025-50666 is a high-severity flaw (CVSS 7.5) affecting di-8003 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of multiple parameters in the /web_post.asp endpoint. An attacker can exploit this vulnerability by sending a crafted HTTP GET request in parameters such as name, en, user_id, log, and time.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-120
Published	2026-04-08
Last modified	2026-07-25

Publisher (CNA): MITRE · Vendor: dlink

Last updated 2026-07-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 19:24 UTCPublished CVE record published
2026-07-25 11:10 UTCUpdated Record last modified

dlink di-8003 firmware MITIGATE

Affected: 16.07.26a1

Fixed in: no fixed release known

Safe to downgrade to: a release before 16.07.26a1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-50666?

di-8003 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-50666 being exploited?

CVE-2025-50666 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-50666 affect?

CVE-2025-50666 affects di-8003 firmware. Severity is high (CVSS 7.5). A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of multiple parameters in the /web_post.asp endpoint. An attacker can exploit this vulnerability by sending a crafted HTTP GET request in parameter

How urgent is CVE-2025-50666?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2025-50664 HIGH 7.5 MITIGATE A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of parameters in
CVE-2025-50665 HIGH 7.5 MITIGATE A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of input paramete
CVE-2025-50662 HIGH 7.5 MITIGATE A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of the name param
CVE-2025-50663 HIGH 7.5 MITIGATE A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of the name param
CVE-2025-50670 HIGH 7.5 MITIGATE A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of parameters in

References

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